Press.



No. 687,802. Patnted Dog. 3, I90l.

S. J. WEBB.

PRESS.

IApplicntion med Feb. 23, 1897.) (No Model.) 5 Sheats--Sheet I.

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No. 687,802. Patented Dad. 3, I901.

s. .1. WEBB.

PRESS.

(Application filed Feb. 28, 1897.)

(No Model.) 5 Sheeis-Sheet 2.

Wilwwooeo v THE norms vzrzns co. PHoYc-uma. WASHINGTON, Dy 1:v

N0. 687,802. Patented Dec. 3, I901.

s; J. WEBB.

' PRESS.

(Application filed Feb. 23, 1897.) (No Model.) 55heets-$heet 3.

I @3. 70 Q .20 I 29 28 s 20 440 Patented Dec. 3, MN. 8. J. WEBB.

PRESS.

(Application filed Feb. 23, 1897.)

(No Model.)

No. 687,802. Patented Dec. 3, I901.

' s. J. WEBB.

PRESS.

(Application filed Feb. 25, 1897) (No Model.) V 5 SheetsSheet 5. Y

I910. i 8 V 8 21 lm/knew UNITED v STATES PATENT Prion.

SAMUEL J. WEBB, OF MINDEN, LOUISIANA.

SPECIFNATION forming part of Letters Patent No. 687,802, dated December3, 1901.

Application filed February 23, 1897. Serial No. 624,634. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL J. WEBB, a citizen of the UnitedStates,residing at Minden,in the parish of Webster and State ofLouisiana, have invented certain new and useful Improvements in Presses,of which the follow ing is a specification.

Myinvention relates to that class of presses in which a movable platenis operated from an engine or other actuating device through the mediumof levers and links; and my invention consists of certain improvementsto strengthen and simplify the construction of the press and whereby tosecure a greatlyincreased pressure toward the termination of themovements of the platen, as fully set forth hereinafter and asillustrated in the accompanying drawings, in which- Figure 1 is a sideelevation of a press embodying my improvement. Fig. 2 is a sectionalelevation slightly'modified. Fig. 3 is a sectional plan on the line 2 2,Fig. 1. Fig. 4 is a plan of the fixed-platen frame. Fig. 5 is a detachedsectional view of one of the arms and levers. Figs. 6 and 7 arediagrams. Fig. 8 is a perspective view of the parts shown in Fig. 5.Fig. 9 is a modification plan of the fixed-platen frame and tie-rods forsame. Fig. 10 is a side elevation of Fig. 9.

A is the upper fixed platen, and B the lower movable platen, and G theengine or other operating means of the press. As shown,the upper platenis secured to ora part of a'heavy frame A, having ears 8 and flanges 9,which latter rest upon supports 10, that have their bearings upon afoundation 12, and to the upper part of the frame A are bolted the lowerends of standards D D, to the upper ends of which .is bolted the lowerhead of the cylinder of the engine.

Between the ears 8 8 at the opposite side of the frame are pivoted, asby cross-pins 13, the lower ends of arms 12, the upper end of each armbeing pivoted to a lever c and forms a toggle-like arrangement. Asshown, the arms?) are somewhat narrower than the levers c and arepivoted thereto by fitting the upper cylindrical or rounded ends of thearms 6 into concave or rounded sockets in of the levers c are connectedby a cross-pin 15 to theend of the piston-rod 16 of the engine or otheroperating device, and the piston-rod is provided with guides working ingrooves 28 in the frame A and standards D, as shown in Figs. 3 and 4.

From the lower platen B extend upward rods 6 6, two on each side, theupper ends of each pair of rods being connected by a crosspin 17, onwhich swingliuks a, each link having at the inner end a recess orbearing fora lug or pin 18 upon the outside of the adjacent lever c, thesaid pin 18 being arranged between the pivotal point of the arm b,whichconstitutes the fulcrum of the lever c, and the connecting-pin 15, butin close proximity to the pivotal point or fulcrum. The frame A ispreferably a hollow partitioned structure with a central recess orpocket 0;, Fig. 2, to receive the end of the piston-rod and the levers cwhen the lower platen is down.

Assuming the parts to be in the position shown in Fig. 2, with theplatens separated, the upward motion of the pin 15 will tend to lift theupper ends of the levers 0, thereby swinging their fulcra outward in thedirection of the arrows, bringing the links a and arms 1) toward theposition shown in Fig. 1 and lifting the pins 17, connecting-rods e, andlower platen B. By the arrangementof arms and levers described I amenabled to secure an easy but gradually accumulating and very powerfullever action. Thus, as shown in the diagrams Figs. 6 and 7, at thebeginning of operations, Fig. 6, the upward movement at the point 15lifts the lever c and swings the arm I) onits pivot 13 in the directionof its arrow, causing a thrust upon the link a, which imparts an upwardmovement to the pin 17, quickly lifting the lower platen at thebeginning of operations, when there is but little resistance. As theconnectingpoint 18 rises above the fulcrum y of the lever 0 the arms I)and links a are gradually straightened with a toggle-like action andgradually-accumulating leverage as a result of such action; but there isalso an increased leverage in proportion to the distance between thepoints 18 and 15 on' the lever c in respect to that between the points yand 18, so that as the parts approach the position Fig. 7 there is inaddition to the toggle-like action and its result a powerful liftingaction resulting from the gradual approach of each movable fulcrum y toa position vertically above the pivot 13 and from the swinging of thelever 0 around the fulcrum i ,lifting the point 18, the link a, and theparts attached to the-latter. By this means toward the termination ofthe stroke I secure an enormous compression action with practicallyuniform leverage during the latter part of the stroke, which enables meto get the same pressure on bales of different thicknesses without anyadjustment of parts.

It will be seen that I secure a more extended action by carrying thepivotal points 18 below and above the movable fulcra y, as shown inFigs. 2, 6, and 7. This results from so connecting the arms Z) andlevers c as to permit the links a to swing past the sides of the leversc and past the pivotal points y, and by forming the pivotal point y byinserting the rounded ends of the arms I) in rounded sockets of theleverc I avoid the use of pivotpins, confine the joints within thelimits required, and secure the requisite strength.

The connecting-rods e are prevented from spreading at their upper endsby cross-bars s, Fig. 1. Said cross-bars are provided with guides 20,which are guided by ribs on the standards D, Fig. 3, and theconnecting-rods e may be connected to the yoke g of the lower platen B,as shown in Fig. 2, or may be continued around the rounded lower side ofthe platen. In either case thereis formed a yoke g, securing a strongconnection of the parts. The platen B is thus loosely seated in the yokeg and can 'move therein if perchance there is too much resistance on oneend thereof.

While I have described the levers c as having movable fulcra y at theends of the pivoted arms I), the said levers may have fulcrumbearingsotherwise formed-as, for instance, upon a curved portion of the frame,as illustrated in my application Serial No. 623,151. In either case themovements of the lever will be the same and with the same effect as faras the operations upon the movable platen are concerned.

The frame A may have one or more bearings or supports for the pin 13,but is preferably formed at each end with three ears 8, Fig. 4, so as tosupport the pin 13 at or near its center, as best shown in Fig. 9 on theleft side. This permits of a much smaller pin and greatly reduces thefriction and the cost of said pin and of the frame A.

The lower end of each arm I) may be rounded off the same as at the upperend to work in a socket in the frame A, as shownat the right-hand sideof Fig. 10. In this case the arm may be held in position by means of asmall pin 21 passing through it, the same as the pin 19 at the oppositeend. In some cases I prefer to make the stationary frame A withcentrally-located ribs 22 22, which carry a large portion of the strainon the platen A in direct line to the center of the pin 13 and also forma central support for said pin. The ribs 22, 23, 24, and 25 form thesides ofa hollow column in each corner of the frame. These columns carrythe load on pin 13 direct to the platen, thus relieving the frame of allbending or twisting strains, the columns being subjectto only acompression strain. The frame A is preferably provided with flanges 26and 27, which are bolted to the standards 10 for supporting the frame.The frame may also be provided with flanges 29 for supporting thecolumns D.

In some cases where very heavy strains are required it is necessary tostrengthen the frame A, and this I accomplish without increasing thethickness of the frame by attaching tie-rods 30,which pass through beams31 at the ends of the frame, thus forming a yoke. These rods may passthrough the corners of the frame or around the end of the same, and thusavoid, the necessity of beams 31. hen themovable platen moves upward, ifthe halo being compressed is unusually thin the ends of the levers 0come in contact with bumpers 41, which limit the upward movement of thelevers and prevent them striking the bottom'of the cylinder. Thesebumpers 41 may be differently arranged, and are shown as attached torods 40, which are secured to the flanges 29 of the frame A;

It is evident that some of the improvements may be used in otherpresses, and I do not wish to confine these improvements to thisparticular press, but wish to use them in any press to which they maybeapplied.

WVithout limiting myself to the precise construction and arrangement ofparts shown, I claim as my invention- 1. In a press, the combination ofthe fixed and movable platens and actuating means, and levers eachhaving a movable fulcrum at one end, and the other end connected to theactuating means, and links connected to the levers between their ends,and rods connecting the links and the movable platen, substantially asset forth.

2. The combination with the movable platen and actuating means of apress, of connectingrods extending from the platen, levers each having amovable fulcrum at one end, and the other end connected with theactuating means, and links between the levers and the said rods,substantially as set forth.

3. The combination with the operating-levers c, of a press, and with themovable platen, of links connected to said levers and rods connectingthe links and platen, and pivoted arms constituting the fulcra of thelevers, substantially as described.

4. The combination with the platens and actuating means of a press, ofthe levers 0, links a, connected to the sides of the levers, and arms I)having their bearings between the sides of the levers, said linksconnected with the movable platen, substantially as set forth.

5. The combination in a press of a stationary bed and a supporttherefor, an engine above the stationary bed and intermediate standardsD, arms I] pivoted to the stationary part of the apparatus, levershaving their bearings on said arms and connected with the piston of theengine, a movable platen and rods extending therefrom, and linksextending from the said'rods and connected to the levers, substantiallyas set forth.

6. The combination of the movable platen and levers and connectionsbetween the levers and the platen, an operating-engine and a fixedplaten or frame comprising a number of hollow columns extending from thefixed platen and forming supports for the operating-levers and forming apocket or chamber a' to receive the said levers when in a loweredposition, substantially as set forth.

7. The combination with the movable platen, operating-engine, andconnections, of a fixed platen comprising a frame A provided with ears8, supporting-flanges 9, and a yoke consisting of the tie-rods and beams31, substantially as described.

8. In a press, the combination with the stationary and movable platens,of an engine and lever connections for the movable platen, thestationary platen comprising a frame having bearings for the fulcra ofthe levers and hav-' ing ribs extending from said hearings to thestationary platen, substantially as described.

9. In a press, the combination with the stationary and movable platens,of an engine and lever connections, a frame A having bearings in theform of ears 8 arranged to centrally support the arms I) of the leverconnections and having ribs 22, 23, 24, 25, forming columns extendingfrom the stationary platen to the bearings and supporting the latter,and a yoke comprising tie-rods and beams arranged to support the frameA, substantially as described.

10. The combination of the platens and levers and operating devices of apress, and a frame provided with centrally-located ribs extending fromthe platen in the direction of the fulcrum-bearings and forming columnsor supports for said bearings, for the purpose described, substantiallyas set forth.

11. The combination with the movable platen and piston, of operatingmechanism connecting the platen and piston comprising levers each set ofwhich has a knuckle-joint one member of which is convex and the other ofwhich has a concave portion against which the periphery of the convexportion of the first-mentioned member bears, lugs on the members, and apin extending through said lugs and joining the two members, substantially as set forth.

In testimony whereof I have signed. my name to this specification in thepresence of two subscribing witnesses.

SAMUEL J. WEBB.

Witnesses:

A. H. GOODENOUGH, CAMERON E. STRAUSS.

